A dream featuring diamonds symbolize a tough character and self-focus.
To find diamonds in a dream suggests that you can expect good luck in the near future, while to steal diamonds suggests that you don't feel qualified for or worthy of your ambitions.
If someone gives you a diamond or diamonds then it symbolizes a sense of commitment or dedication to someone or something in your life. If you lose a diamond then it may imply that you need to give yourself more credit for something than you currently do.
Having or wearing diamonds implies that you acknowledge your achievements in your life.